Social Preview Checker

Why check the social share preview?

Missing or incorrect Open Graph tags make shared links look bad on social media — no image, wrong description — hurting click-through rate. The tool simulates the preview and lists every tag.

When a link is shared on Facebook, Zalo or Twitter/X, the platform reads Open Graph tags (og:title, og:description, og:image) and Twitter Card meta — not the actual page content — to build the preview. If these tags are missing, the platform picks a random image or paragraph from the page, which usually looks unprofessional and reduces click-through rate. The Social Preview Checker reads the page's OG and Twitter Card tags directly, rebuilds a Facebook-style preview so you can see it beforehand, and lists every declared hreflang pair (important for multilingual sites like vi/en) so you can quickly spot a missing language.

• Simulates the preview like a Facebook share
• Open Graph and Twitter Card checklist
• Lists declared hreflang tags for multilingual SEO

Example: interpret a finding and fix it

Illustration only, not a check of your website.

You changed an article image but shared links still show the old one. Inspect og:image in the published HTML and request the image URL before clearing only your personal browser cache.

If this checker reads the new image, the social platform may retain its own cached preview. Use its debugging tool where available and verify the actual shared card. Avoid changing the article URL solely to refresh an image.

This preview simulates public metadata. Each platform may crop images or choose different text. Listed hreflang links reveal declarations, not proof that Google has accepted the translations.